Ambient lighting (led bars under the dash)... sold as a 'kit' by MoPar for chargers/minivans/something-or-other-besides-Challenger... easy little drill bit modifications to center console to allow mounting of controls... other than that... easily done in less than ninety minutes.

Short throw MoPar shifter... again available from MoPar. Another easy do-it-yourself task, complete in less than 30 minutes.

Emergency brake pedal cover... available from Mercedes Benz parts dept for less than $20 to match the stock ones on the SRT. A little 'dawn' to lubricate the pedal and this is done in less than 10 minutes.

Window tint... leave it to the pros.

--- Guess I will post a similar post on the 'exterior' topic. ---

that said... Maybe this is a good place for anyone that might be 'looking' for information/etc/ from people who have already installed stuff... they could look here, and then shoot us a p.m. if they have any questions, if we have similar mods to what they are considering.
Feel free to shoot me one anyway.
Anybody else wanna jump in with your mods... let's rock this boat a bit!